Everhour turns tracked billable time and expenses into invoices, while invoice software keeps client billing structured and traceable.
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Invoice software helps you create a billing document that tells the client who billed them, what they bought, how the amount was calculated, when payment is due, and where payment should go. A practical invoice includes seller and buyer details, invoice date, invoice number, line items, subtotal, tax line when applicable, total due, payment terms, and remit-to information.
An invoice is separate from a receipt, estimate, or quote. A receipt proves payment received. An estimate gives a pre-work price expectation. A quote is a firmer pre-work offer. An invoice requests payment for goods or services already provided or contractually billable, so the software needs to preserve the billing record rather than just format a page.
Good invoice software starts with the fields you actually need. For ordinary United States private-sector invoices, no single federal statute prescribes a universal invoice form. Businesses can use a recordkeeping system suited to the business if it clearly shows income and expenses, and invoices serve as supporting documents for business transactions and gross receipts.
The fields still matter. Use sequential invoice numbers, clear issue and due dates, itemized descriptions, quantities, rates, extended prices, discounts when used, and payment terms. For federal procurement invoices, FAR 32.905 defines proper invoice fields, including contractor details, invoice date and number, contract or order references, line items, remittance details, defect-contact details, and TIN or EFT banking data when agency procedures require them.
The United States does not have a national VAT or GST invoice regime. Sales and use tax obligations come from state and local jurisdictions, so invoice software should let you apply the correct tax treatment for the sale instead of forcing one national tax setting. Washington, for example, has a 6.5% state sales-tax portion plus a local portion based on where the customer receives the goods or services.
Service taxability also varies by state and service type. California generally taxes retail sales of tangible personal property and only some service or labor charges, while Texas defines 16 broad categories of taxable services. Remote sellers need separate nexus checks. South Dakota v. Wayfair addressed a law applying to sellers with more than $100,000 in sales into South Dakota or 200 or more separate transactions annually, and other states set their own rules.
A one-off invoice tool is enough when you need a single PDF, know the billing details, and can store the record in your own files. That works for a small job, a simple client request, or a corrected invoice where the time and rates are already settled. The weak point appears when billable hours, expenses, approvals, and invoice status live in separate places.
A managed workflow fits recurring client work. Everhour Billing & Invoicing lets teams select uninvoiced time and expenses, calculate invoice amounts from billable time, rates, and billable expenses, exclude non-billable work, and export invoices to QuickBooks Online, Xero, or FreshBooks. That creates a cleaner handoff from tracked work to client billing.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
High Performer
G2
Summer 2026
Best Ease Of Use
Capterra
Summer 2026
Rated in the top time trackers across G2, Capterra, and TrustRadius — with consistent praise for ease of use, integrations, and support.
Invoice software should support invoice numbers, issue dates, due dates, seller and buyer details, line items, subtotals, tax lines, totals, payment terms, and remit-to details. Stronger systems also keep client defaults, discounts, invoice status, and exports so the invoice remains useful after delivery.
United States invoice software does not need a national VAT or GST setup for domestic billing because the country does not use a national VAT or GST invoice regime. Sales and use tax settings need to follow state and local rules, including product or service taxability and the place of sale.
Automatic sales-tax settings only help when the software uses the correct state and local rules for the sale. A flat national rate is wrong for United States invoices. Rates and taxability depend on the applicable jurisdiction, nexus, the product or service sold, and where the customer receives the goods or services.
Invoice software supports business records, but it does not replace the need to keep complete records. IRS Publication 583 lists invoices as supporting documents that show business transactions and amounts and sources of gross receipts. Keep the invoice, payment evidence, contracts, and related work records together.
Federal contract invoices need fields that match FAR 32.905 when the invoice is submitted for federal procurement. The invoice may need contract or order references, descriptions, quantities, unit and extended prices, payment terms, remittance details, and TIN or EFT banking data when agency procedures require them.
Everhour Billing & Invoicing converts tracked billable time and expenses into client invoices. It calculates invoice amounts from rates, time, and billable expenses, excludes non-billable tasks, applies client defaults such as taxes, discounts, and payment terms, and exports invoices to QuickBooks Online, Xero, or FreshBooks.
Everhour shows exported invoice status, invoice number, issue date, and amount after invoices move to QuickBooks Online, Xero, or FreshBooks. Custom reports can include billable, non-billable, invoiced, and uninvoiced amounts so project and billing records stay aligned.
Track approved time, expenses, rates, and invoice status in one billing workflow. Everhour connects project work to invoices and accounting exports without rebuilding client bills manually.
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